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| Number | Title | Issue Date |
| 7190137 | Method to control an electronically commutated motor and motor controller The invention relates to a method to control an electronically commutated motor in which the motor current is influenced as a function of an operating parameter of the motor. According to the invention, the motor current is adaptively switched as a function of the o... | 03/13/2007 |
| 7187142 | Motor drive with velocity noise filter A drive unit for controlling a motor includes a position feedback device and a velocity noise filter. The position feedback device is operable to generate a position signal relating to a position of the motor. The velocity noise filter is coupled to the position fee... | 03/06/2007 |
| 6977473 | Travel control method of electric vehicle In a travel control method for an electric vehicle, an accelerator angle is obtained from a position of an accelerator lever. An accelerator percentage is determined in accordance with the accelerator angle. The ON times of first and second brake buttons are read. B... | 12/20/2005 |
| 6600278 | Clean power common buss variable frequency drive system A N pulse variable frequency drive for driving two or more motors that is the combination of two or more variable frequency drives with each drive driving an associated one of the two or motors. One application is a decanter centrifuge which has a main mo... | 07/29/2003 |
| 6512342 | Brushless motor driving device A brushless motor driving device is so configured to control excitation of each phase armature coil an the basis of starting patterns supplied from a start circuit in a starting operation and a rotator position signal obtained from an induced voltage gene... | 01/28/2003 |
| 5847534 | Control system for electric vehicle The control system is constructed so that an inverter output frequency command is increased/decreased based on a frequency-to-time rate-of-change command, and the frequency-to-time rate-of-change command is controlled with a current control system. Furthe... | 12/08/1998 |
| 5644200 | Driving electrical machine speed controlled power combined system and device A combined driving structure is made up of an engine and an electrical machine. The engine is connected to the electrical machine through a clutch which allows the electrical machine to be used as a starting motor for the battery, and when the engine is s... | 07/01/1997 |
| 5625262 | System for equalizing the load of a plurality of motors A system having two or more A.C. motors driving the same load. The stator windings and rotors of both motors each conduct current having a vector representative of a magnitude and angular position of the current in the respective rotor and stator winding.... | 04/29/1997 |
| 5248922 | Multi-DSP, multi-functional motion controller A motion controller, which is adaptable to a variety of different motors, provides motor control signals to the motors of a multi-axis coordinated system as a function of position and velocity commands from a host computer. The motion controller configure... | 09/28/1993 |
| 5012165 | Conveyance with electronic control for left and right motors A conveyance (10) is provided with automatic limiting (223) of the rate of change in power supplied to first (26a or 232a) and second (26b) motors, whether the motors are electrical or hydraulic; and dynamic braking of electric motors (26a and 26b) is ach... | 04/30/1991 |
| 4988937 | Synchronous control system and method therefor A synchronous control system for a pair of spindles of a machine tool including a master spindle and a slave spindle. Current positions of the main spindles are detected, and a deviation between the detected current positions is calculated. In case the de... | 01/29/1991 |
| 4959808 | Method and apparatus for the distance control of a positioning drive A first acceleration reference value is continuously determined by a nonlinear distance control. In parallel thereto, a second acceleration value is generated by a nonlinear velocity controller. A simple selection criterion that comprises only these two a... | 09/25/1990 |
| 4458185 | Propulsion control apparatus for passenger vehicles A cam controller for determining the operation of an electric motor is coupled with a stepping motor to provide predetermined positional movements of the cam controller in response to a desired electric motor operation control signal and in accordance wit... | 07/03/1984 |
| 4325115 | Regulated DC power supply A regulated DC power supply has a converter having a plurality of switches which, upon proper regulation of their conduction, rectify an AC current. The converter produces a current feedback signal. A reference generator produces a plurality of adjustable... | 04/13/1982 |
